/Engine/Source/Runtime/UMG/Public/Blueprint/UserWidget.h
virtual [FNavigationReply](API\Runtime\SlateCore\Input\FNavigationReply) NativeOnNavigation ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & InGeometry, const [FNavigationEvent](API\Runtime\SlateCore\Input\FNavigationEvent) & InNavigationEvent )